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stm32f103 usart3 seems don't work [solved]


diego bertotti:

just to share some information with all about a problem i have

usart3 tx pin PB10 alternate function, is shared with the i2c2 peripheral, then you must disable the i2c2 clock in order to enable the usart3 access to PB10 pin.

just look From the Errata Sheet of stm32f1xx:

2.9.6 I2C2 with SPI2 and USART3 Conditions

@Mir thanks for the info


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